Foot-bolt for holding doors.



No. 884,768. PATENTED APR. 14, 1908.

- H. R..SHAPER.

FOOT-BOLT FOR HOLDING DOORS.

APPLICATION FILED JUNE 5; 1907.

7 Q L. h /0 $230868 0 r Attorneys.

HOMER R. SHAFER, OF DETROIT, MICHIGAN.

FOOT-BOLT FOR HOLDING DOORS.

' Specification of Letters Patent.

Patented April 14, 1908.

I Application filed June 5, 1907. Serial No. 377,358.

To all whom it may concern:

Be it known that I, HOMER R. SHAFER, a citizen of the United States,residing at Detroit,'county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Foot-Bolts for Holding Doors, anddeclare the following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which it pertainsto make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification.

This invention relates to foot bolts adapted and intended to be used forthe purpose of holding a door in the position to which it may be swungother than its latched position. The device consists of a casing adaptedto be attached to the door the casing contains within itself aprojectile bolt adapted to retract automatically from a projectedposition, but which is provided with means for holding the bolt in therojected position and in which the bolt itseff is provided with a secondspring adapted to project it beyond or forward with respect to theretracting portion of the bolt.

In the drawings :Figure 1, is a perspective of the bolt attached to adoor. Fig. 2, is a vertical section. Fig. 3, is a plan of a ring clampused in connection with the bolt.

A casing which is adapted to be secured to the door is indicated at 1,this is tubular and semi-circular. In the upper end it engages a slidingcasing 2, to which is secured the upper end of a retracting rod or bolt3. Across the casing 1, is a diagram or abutment 5 against which thelower end of a retracting spring 6 engages. The retracting spring 6 isreferably spiral in form and surrounds the bar or bolt 3, between theabutment 5 and an abutment 7, contained within the sliding head part 2of the structure. An abutment head 8 is secured to the bar 3, below thefixed abutment 5. The spring 6 when compressed between its terminalabutments 5 and 7 by downward pressure upon the upper surface of theabutment, as by the foot of the operator, yieldingly opposes the descentof the bolt 3, which in turn causes the forcing of the cushion 10against the floor. At the lower end of the casing is a second sliding ortelescoping casing 9, which engages in the casing 1, and which isprovided with a cup on its underside to contain a rubber or cushion 10.A diaphragm 11 forms the base of the cup; above this diaphragm 11extends a tubular coupling 12, which engages telescopically over thelower end of the rod 3 and is held from escaping from the rod 3 by acollar 13, which terminates the rod 3 and engages under the inturnedflanges 14 on the telescopic tube 12 this allows the rod 3 to movefreely down in the tube, this increasing the tension of spring 15 to anydesired amount, but engages to lift the tube and the cushion 10; thetension of spring 6 does not necessarily counteract the tension of thespring 15 neXt referred to.

A strong spring 15 engages around the bar 3 between the abutment 8 andthe upper surface of the diaphragm 11; this strong spring serves toproject the telescoping member 9, of which the cup member forms a part,and which contains the cushion 10 downward against the floor with astrength which is determined by the amount of pressure exerted inforcing it downward in the first instance.

The sliding member 2 is held in place after it has been forced downwardby the foot, or in any other way, by a ring clamp 16, pivoted to thecasing 1, and engaging around the sliding member 2 and provided with anextension 17 by means of which it may be pressed down by the foot torelease its clamping action on the member 2.

The case 1 is provided with cars at convenient points along its length,containing appropriate holes for the insertion of holding screws.

While the case is shown and described as semi-cylindrical, with a plainrear facing, it is quite evident that that is a feature of constructionmerely, adapting it to be secured readily to a flat or plane surface,and that the special shape or form given to the various parts is notmaterial to the invention, of which the novelty consists in the use ofthe forcing spring 15, which holds the cushion member 10 against thefloor with any desired amount of force and without reference to thetension for the time being stored on the lifting spring 3, which liftsthe entire bolt when the clamp 16 is released.

, What I claim is In combination with a main casing pro-' of said maincasing, one of said casings being depressed condition against the forceof its 10 fixed to its end of the bolt, and the other spring,substantially as described.

having a sliding connection therewith, com- In testimony whereof, I,sign this specifipression springs engaging between each side cation inthe presence of two witnesses.

pf said abutment and the inner face of the HOMER R SHAFER elescopingcasing opposite the same, and a clamping ring engaging about the upperone Witnesses: of said telescoping casings with a sliding con- CHARLESF. BURTON, nection, whereby the same may be held in MAY E. KOTT.

